Light Quality Evaluating Device Using Spectral Resemblance Index
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Solution Overview
Problem
Conventional color rendering index (CRI) methods for evaluating light source quality do not account for human physiological perception, leading to inconsistencies and lack of fairness in assessing visual performance, vista, vitality, and empowerment.
Innovation Solution
A light quality evaluating device that transforms a light source's power spectrum into a luminance spectrum using a luminosity function and compares it with a blackbody radiation spectrum to calculate an index of spectral resemblance (SRBR), providing a more comprehensive evaluation of light quality based on human perception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If CRI method is used to evaluate light source quality, then the evaluation process is simple and straightforward, but the evaluation results lack fairness and consistency because they do not account for human physiological perception
Solution Approach 1:
The patent introduces a luminosity function as an intermediary between the light source spectrum and the evaluation result. This luminosity function models human physiological perception of light, serving as a mediator that transforms objective spectral data into subjectively relevant evaluation metrics. By incorporating this intermediary layer, the system maintains computational simplicity while achieving perceptually accurate evaluation results.
2Device complexity
If CRI method is used to evaluate light source quality, then the measurement process is straightforward, but the evaluation does not reflect visual performance, vista, vitality, and empowerment that are important to human perception
Solution Approach 1:
The patent transforms the evaluation parameters from simple color rendering metrics to perceptually-relevant parameters by applying the luminosity function. This parameter transformation converts objective spectral power distribution data into weighted luminance values that reflect human visual sensitivity across different wavelengths, thereby preserving physiological perception information while maintaining measurement feasibility.
3Measurement precision
If SRBR index is used to evaluate light source quality, then the evaluation reflects human physiological perception and provides fair and consistent results, but the calculation process becomes more complex requiring luminosity function transformation
Solution Approach 1:
The patent replaces complex physiological measurement systems with a computational model. Instead of physically measuring human perception responses, the system uses mathematical transformation through the luminosity function to simulate human visual perception. This substitution achieves accurate perceptual evaluation while avoiding the practical complexities of direct physiological measurement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The SRBR index offers a fair and consistent method for evaluating light source quality, improving the assessment of visual performance, vista, vitality, and empowerment compared to traditional CRI methods.
Implementation Method 1
a light receiving unit, used for receiving a light signal emitted from an external light source
Implementation Method 2
the first process unit has a black body radiation spectrum transforming module for processing the light signal to a spectrum data, so as to transform a color temperature data obtained from the spectrum data into a black body radiation spectrum
Data Source
AI summary
The present invention relates to a light quality evaluating device, comprising a light receiving unit, first processing unit, a memory unit, a second processing unit, a display unit, and a power management unit, and being used for evaluating the light quality light based on physiological perception of human. In evaluating operation, it transfers a power spectrum of the light emitted from a light source to a luminance spectrum of light through a luminosity function. Next, the method compares the luminance spectrum of light with a corresponding luminance spectrum of blackbody radiation thereof. Therefore, an index of spectral resemblance with respect to the black body radiation (SRBR) would be calculated and then obtained, such that the SRBR can be used for evaluating the quality of the light emitted from the light source. Moreover, comparing to conventional CRI, SRBR is a better light quality evaluating method because of having fairness and consistency.